Mandrel for bobbins



MANDREL FOR BoBBINs Filed Dec. 1i, 1940 INVENTOR.

A TTORNEYS.

Patented YJuly 29, '1941 MANDREL FOR BOBBINS Albert E. Winslow, NewLondon, conn., assigner to Atwood Machine Company, a corporation ol'Connecticut Application December 11, 1940, Serial No. 369,682

6 Claims.

'Ihis invention relates to a mandrel for a textile bobbin of the typeused in winding and reeling machinery where it is desirable to doll thebobbin and supply a fresh core for the building up of a fresh package.

One of the objects of the invention is to provide for the easier andquicker doiilng of the bobbin and replacing of a fresh bobbin core inposition.

Another object of the invention is to provide an arrangement whereby itis unnecessary to remove any part of the bobbin mandrel for placing afresh bobbin core in position.

A further object of the invention is to provide a trigger release in themandrel so that the gripping of the bobbin core may be released uponpressure being applied through the end of the bobbin core.

Another object of the invention is to initially move the bobbin core atthe time of release of its gripping to a position so that more easyremoval of the bobbin core from the mandrel may be effected.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described, andparticularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a central sectional view through the mandrel and the bobbin inposition thereon;

Fig. 2 is a view similar to Fig. 1, illustrating the bobbin core asremoved and the mandrel as moved to its released position;

Fig. 3 is a fragmental sectional view on a ,larger scale showing thegripping and releasing mechanism with the parts in gripping relationsuch as shown in Fig. 1;

Fig. 4 is a lateral section on substantially line 4--4 of Fig. 1; and

Fig. 5 is a fragmental sectional view of the gripping mechanism at theinner'end of the mandrel.

Usually after a bobbin package has been formed, for removal of thatpackage, it is necessary to handle the package by engagement of the yarnitself and also to remove apart of the mandrel for replacing the bobbincore with an empty core. These are time-consuming operations andfrequently awkward because of the position of the mandrel in themachine. In order to simplify this operation I have arranged a mandrelwhich may release the package by pressure on` a cap at the end of themandrel, and

may be easily liftedl from the mandrel, as the movement of the portionof the mandrel released by such pressure serves to release the grip onthe bobbin core; and the following is a more detailed description of thepresent embodiment of this invention, illustrating the preferredmeans bywhich these advantageous results may be accomplished:

With reference to the drawing, I0 designates an arm upon which there isiixedly mounted an arbor II by reason of the arborA being reduced as atI2 and passing through an opening I3 in the arm where thethreads I4 ofthe reduced portion are engaged by a nut I5. To hold the arbor Il infixed relation with reference to the arm, a spacing washer I6 is used toengage a. shoulder I1 of the arbor, as shown in Figs. 1 and 2.' At theouter end of this arbor I I, I have provided a ball bearing housing I8having a head portion 33 and a long tubular portion I9 extending alongand spaced from the arbor and which is recessed as at 20 for thereception of a ball bearing unit 2l which unit is locked in place by aspring collar 22 to retain the ball bearing in housing I3 rotatably,anti-frlctionally mounted upon the arbor I I.

A housing member designated generally 25 is equipped with a needlebearing 26, in recess 21 thereof, which needle bearing is held inposition in this recess and is slidable on..the arbor Il with thishousing member. This housing member is provided with a series of steps23, 20, and 30. on its outer periphery with shoulders between thesesteps, as illustrated in Fig. 2. A sleeve 3I encircles and is receivedupon the ball bearing housing I8 and fixed thereto, while it is slidablyreceived upon thestep 23. This sleeve is provided with' a series ofopenings 32 located peripherally about the sleeve, as illustrated 'inFig. 4, in alignment with the head portion 33 of the ball bearinghousing I8. Radially inwardly from each of these openings 32, there islocated a bore 34 extending through the head 33 and parallel to thearbor axis, while there is an opening 35 extending from the bore 34 andin registry with the opening 32. A unit such as a ball 33 is located ineach one of said registering openings of la sizeto project through theopening 32 but limited from passing completely therethrough by reason ofa slightly greater diameter.

Locking pins 3l are located in each of said bores 34 at one end and alsoslidably located in a bore 30y in the head portion 39 of the needlebearing housing so as to be relatively axially and mandrel to a positionfrom which the core movable in said bores. of said pins 31 and actsbetween the head 33 and A spring 40 encircles each a shoulder 4I on thepin 31, tending to move said pin to the left, as shown in Figs. 1 and 2.Each of these pins is equipped with a cam surface 42 which engages itsball 36 so that when said pin is moved to the left, as shown in Figs. 1,2, and 3, the ball 36 will be forced outwardly through its registeringopenings 35 and 32 into the position shown in Figs. 1 and 3. A spring 45encircles the tubular portion I9 of the ball bearing housing abuttingthe washer 46 which is held in place by spring ring 41 encircling thistubular portion. This spring acts against the thread plug 48 engagingthe tubular portion 49 of the needle bearing housing and which isslidable along the hub I9.

A latch illustrated as a rockable pin 50 has a tapered end 5I and willrock in opening 52 in the head 33 by reason of lock washers 53 and 54 oneither side of the opening 52. This latch has its inner end 55 urgedinwardly by a spring 56 (see Fig. 2). A cap 60 slidable upon the endportion 6I of the arbor Il is urged outwardly by means of the spring 62housed in a bore 63 of the arbor and engaging a recess 64 of the cap 6U.The movement of this cap is limited by set screw 65 entering recess 66in the arbor, while an inclined surface 61 engages the tapered end 5I ofthe latch 50.

When it is desired to position the core 16 for a winding of the bobbinpackage 1|, such as shown in Fig. 1, this empty core 16 will be slidover sleeve 3|, as shown in Fig. 2, until its end engages the abutment12 between steps 29 and 30 of the needle bearing housing and then byfurther movement the core will be forced inwardly until the latch 50,which is urged by spring 56, swings upwardly so that its end 55 engagesthe cap 48 on the end of the tubular portion 49, where the housingmember will be held in its retracting position, as shown in Fig, 1. Asthe sleeve 3| is moved from the position shown in Fig. 2 to the positionshown in Fig. 1, the housing member 25 is also moved so that springs 40are permitted to move the pins 31 from the position shown in Fig. 2 tothe position shown in Fig. 1, which movement will cause the balls 36 tobe forced outwardly, as shown in Fig. 1, by reason of the cam surface42, and the core 1D will be rmly locked in position at its outer end.The inner end will be frictionally engaged by the spring-pressed members15 located at spaced points about the step 29. The yarn will then bewound upon the core, usually by reason of surface drive. When thepackage has reached cornpletion, for removal it will be necessary onlyto press the cap 60 inwardly through the end 13 of the core. Pressingthis cap inwardly causes the siu'face 61 to engage the tapered end 5I ofthe latch 50 and to rock it so that its end 55 disengages the cap 48 onthe end of the tubular portion 49, and the core and its bobbin will thenbe moved to the position shown in Fig. 2, by action of spring 45. Thehousing 25 engages the ends of 'the pins 31, forcing them to the rightas shown in Figs. 1 and 2, so= that the balls 36 may move into thedeeper portion of the notches in these pins, thus causing the balls torelease the core; and it will be merely necessary to insert threefingers into the opening 13 and by expansion of the fingers engage theinner surface of the core,

`and the package may then be removed without touching the yarn.

I claim:

1. A mandrel for a tubular bobbin core comprising an arbor, a memberaxially slldable relative to said arbor, said member being adapted toreceive a tubular bobbin core thereon, and expansible andA contractiblemeans to grip and release said core operable in response to saidrelative axial shifting of said member and arbor, and means operablethrough the outer end of the core to shift said member relative to saidarbor.

2. A mandrel for a tubular bobbin core comprising an arbor, a memberaxially slidable relative to said arbor, said member being adapted toreceive a tubular bobbin core thereon, expansible and contractible meansto grip and release said core operable in response to said relativeaxial shifting of said member and arbor, a spring urging said memberaxially to release position, and a latch to hold said member in grippingposition.

3. A mandrel for a tubular bobbin core comprising an arbor, a memberaxially slidable relative to said arbor, said member being adapted toreceive a tubular bobbin core thereon, expansible and contractible meansto grip and release said core operable in responseto said relative axialshifting of said member and arbor, a spring urgingsaid member axially torelease position, a latch to hold said member in gripping position, andmeans operable through thev end of said core to move said latch torelease position.

4. A mandrel for a tubular bobbin core comprising an arbor, a memberaxially slidable relative to said arbor, said member being adapted toreceive a tubular bobbin core thereon, expan- `sible and contractiblemeans to grip and release said core operable in response to saidrelative axial shifting of said member and arbor, a spring urging saidmember axially to release position, a latch to hold said member ingripping position, and a cap slidable on said arbor and engageable withsaid latch to move the latch to release position. k

5. A mandrel for a tubular bobbin core comprising an arbor, a sleevehaving a plurality of openings therein, a member axially slidablerelative to said arbor, units projectable through said openings, and apin for each of said units, a spring for urging each of said pins in onedirection, each pin having a cam surface to urge said units outwardlythrough said openings upon movement of the member axially on said arborand the movement of said pins by said springs to cause said units toengage and grip a bobbin core.

6. A mandrel for a tubular bobbin core comprising an arbor, a sleevehaving a plurality of openings therein, a member axially slidablerelative to said arbor and sleeve, units projectable through saidopenings, a pin for each of said units having a cam surface to urge saidunits outwardly through said openings upon movement of the memberaxially on said arbor to cause said units to engage and grip a bobbincore', said pin being slidable parallel to the axis of the arbor, and aspring to urge said pin to cam the members into gripping position.

ALBERT E. WINSLOW.

